3 Various utility functions for dealing with gfxdevices.
5 Part of the swftools package.
7 Copyright (c) 2005 Matthias Kramm <kramm@quiss.org>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
32 typedef struct _linedraw_internal
36 } linedraw_internal_t;
38 static void linedraw_moveTo(gfxdrawer_t*d, gfxcoord_t x, gfxcoord_t y)
40 linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
41 gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
43 if((int)((d->x * 5120) == (int)(x * 5120)) &&
44 (int)((d->y * 5120) == (int)(y * 5120))) {
45 /* never mind- we're already there */
59 static void linedraw_lineTo(gfxdrawer_t*d, gfxcoord_t x, gfxcoord_t y)
61 linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
62 gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
65 /* starts with a line, not with a moveto. As this is the first
66 entry in the list, this is probably *meant* to be a moveto */
67 linedraw_moveTo(d, x, y);
82 static void linedraw_splineTo(gfxdrawer_t*d, gfxcoord_t sx, gfxcoord_t sy, gfxcoord_t x, gfxcoord_t y)
84 linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
85 gfxline_t*l = (gfxline_t*)rfx_alloc(sizeof(gfxline_t));
88 fprintf(stderr, "Error: drawing startpoint is a spline\n");
89 linedraw_moveTo(d, x, y);
93 l->type = gfx_splineTo;
105 static void* linedraw_result(gfxdrawer_t*d)
107 linedraw_internal_t*i = (linedraw_internal_t*)d->internal;
108 void*result = (void*)i->start;
110 memset(d, 0, sizeof(gfxdrawer_t));
114 void gfxdrawer_target_gfxline(gfxdrawer_t*d)
116 linedraw_internal_t*i = (linedraw_internal_t*)rfx_calloc(sizeof(linedraw_internal_t));
120 d->moveTo = linedraw_moveTo;
121 d->lineTo = linedraw_lineTo;
122 d->splineTo = linedraw_splineTo;
123 d->result = linedraw_result;
126 typedef struct _qspline_abc
132 typedef struct qspline_t
139 typedef struct cspline_t
147 static void mkspline(qspline_abc_t*s, double x, double y, gfxline_t*l)
150 Form 1: x = t*t*l->x + 2*t*(1-t)*l->sx + (1-t)*(1-t)*x;
151 Form 2: x = a*t*t + b*t + c
153 s->cx = x; s->bx = 2*l->sx - 2*x; s->ax = l->x - 2*l->sx + x;
154 s->cy = y; s->by = 2*l->sy - 2*y; s->ay = l->y - 2*l->sy + y;
157 static void spline_get_controlpoint(qspline_abc_t*q, double t1, double t2, double*dx, double*dy)
160 double nax = q->ax*dt*dt;
161 double nay = q->ay*dt*dt;
162 double nbx = 2*q->ax*dt*t1 + q->bx*dt;
163 double nby = 2*q->ay*dt*t1 + q->by*dt;
164 double ncx = q->ax*t1*t1 + q->bx*t1 + q->cx;
165 double ncy = q->ay*t1*t1 + q->by*t1 + q->cy;
170 static double get_spline_len(qspline_abc_t*s)
172 int parts = (int)(sqrt(fabs(s->ax) + fabs(s->ay))*3);
177 if(parts < 3) parts = 3;
179 r2 = 1.0/(parts*parts);
182 double dx = s->ax*(2*i+1)*r2 + s->bx*r;
183 double dy = s->ay*(2*i+1)*r2 + s->by*r;
184 len += sqrt(dx*dx+dy*dy);
186 /*printf("Spline from %f,%f to %f,%f has len %f (%f)\n", s->cx, s->cy,
187 s->cx + s->bx + s->ax,
188 s->cy + s->by + s->ay, len,
189 sqrt((s->bx + s->ax)*(s->bx + s->ax) + (s->by + s->ay)*(s->by + s->ay))
191 assert(len+0.5 >= sqrt((s->bx + s->ax)*(s->bx + s->ax) + (s->by + s->ay)*(s->by + s->ay)));
196 void gfxtool_draw_dashed_line(gfxdrawer_t*d, gfxline_t*line, float*r, float phase)
199 double linepos,nextpos;
203 if(line && line->type != gfx_moveTo) {
204 fprintf(stderr, "gfxtool: outline doesn't start with a moveTo");
210 for(i=0;r[i]>=0;i++) {
213 if(!r || (r[0]<=0 && r[0]>-0.01) || dashlen<0.001) {
214 // no dashing. just draw the thing
216 if(line->type == gfx_moveTo) {
217 d->moveTo(d, line->x, line->y);
218 } else if(line->type == gfx_lineTo) {
219 d->lineTo(d, line->x, line->y);
220 } else if(line->type == gfx_splineTo) {
221 d->splineTo(d, line->sx, line->sy, line->x, line->y);
227 if(r[0]<0 || phase<0) {
228 fprintf(stderr, "gfxtool: invalid (negative) dashes: %f, phase=%f", r[0], phase);
232 for(;line;line=line->next) {
233 if(line->type == gfx_moveTo) {
234 d->moveTo(d, line->x, line->y);
235 on = 1; nextpos = r[0]; apos = 0; linepos = 0;
236 x = line->x; y = line->y;
237 while(linepos < phase) {
238 //printf("[+] linepos: %f, phase: %f, on:%d, apos:%d nextpos:%f\n", linepos, phase, on, apos, nextpos);
240 if(linepos < phase) {
248 //printf("[k] linepos: %f, phase: %f, on:%d, apos:%d nextpos:%f \n", linepos, phase, on, apos, nextpos);
249 } else if(line->type == gfx_lineTo) {
250 double dx = line->x - x;
251 double dy = line->y - y;
252 double len = sqrt(dx*dx+dy*dy);
255 double lineend = linepos+len;
260 assert(nextpos>=linepos);
261 //printf("(line) on:%d apos: %d nextpos: %f, line pos: %f, line end: %f\n", on, apos, nextpos, linepos, linepos+len);
262 while(nextpos<lineend) {
263 double nx = x + vx*(nextpos-linepos);
264 double ny = y + vy*(nextpos-linepos);
265 if(on) {d->lineTo(d, nx,ny);/*printf("lineTo %f\n", nextpos);*/}
266 else {d->moveTo(d, nx,ny);/*printf("moveTo %f\n", nextpos);*/}
274 //printf("lineTo %f\n", 1.0);
275 d->lineTo(d, line->x,line->y);
277 x = line->x; y = line->y;
278 } else if(line->type == gfx_splineTo) {
280 double len, lineend,lastt;
281 mkspline(&q, x, y, line);
283 len = get_spline_len(&q);
284 //printf("%f %f -> %f %f, len: %f\n", x, y, line->x, line->y, len);
287 lineend = linepos+len;
290 printf("%f !< %f\n", nextpos, linepos);
291 assert(nextpos>=linepos);
292 //printf("(spline) on:%d apos: %d nextpos: %f, line pos: %f, line end: %f\n", on, apos, nextpos, linepos, linepos+len);
293 while(nextpos<lineend) {
294 double t = (nextpos-linepos)/len;
295 //printf("%f (%f-%f) apos=%d r[apos]=%f\n", t, nextpos, linepos, apos, r[apos]);
296 double nx = q.ax*t*t+q.bx*t+q.cx;
297 double ny = q.ay*t*t+q.by*t+q.cy;
300 spline_get_controlpoint(&q, lastt, t, &sx, &sy);
301 d->splineTo(d, sx, sy, nx,ny);
302 //printf("splineTo %f\n", nextpos);
305 //printf("moveTo %f\n", nextpos);
316 spline_get_controlpoint(&q, lastt, 1, &sx, &sy);
317 d->splineTo(d, sx, sy, line->x,line->y);
318 //printf("splineTo %f\n", 1.0);
320 x = line->x; y = line->y;
325 gfxline_t * gfxline_clone(gfxline_t*line)
330 gfxline_t*n = (gfxline_t*)rfx_calloc(sizeof(gfxline_t));
344 static char splineIsStraight(double x, double y, gfxline_t*l)
346 if(l->type == gfx_moveTo)
348 if(l->type == gfx_lineTo)
354 if(fabs(dx*sy - dy*sx) < 0.000001 && (dx*sx + dy*sy) >= 0) {
360 void gfxline_optimize(gfxline_t*line)
363 /* step 1: convert splines to lines, where possible */
366 if(l->type == gfx_splineTo && splineIsStraight(x,y,l)) {
367 l->type = gfx_lineTo;
373 /* step 2: combine adjacent lines and splines, where possible */
375 while(l && l->next) {
376 gfxline_t*next = l->next;
379 if(l->type == gfx_lineTo && next->type == gfx_lineTo) {
382 double nx = next->x-l->x;
383 double ny = next->y-l->y;
384 if(fabs(dx*ny - dy*nx) < 0.000001 && (dx*nx + dy*ny) >= 0) {
387 } else if(l->type == gfx_splineTo && next->type == gfx_splineTo) {
391 l->next = next->next;
406 gfxline_t* gfxtool_dash_line(gfxline_t*line, float*dashes, float phase)
410 gfxdrawer_target_gfxline(&d);
411 gfxtool_draw_dashed_line(&d, line, dashes, phase);
412 result= (gfxline_t*)d.result(&d);
416 void gfxline_show(gfxline_t*l, FILE*fi)
419 if(l->type == gfx_moveTo) {
420 fprintf(fi, "moveTo %.2f,%.2f\n", l->x, l->y);
422 if(l->type == gfx_lineTo) {
423 fprintf(fi, "lineTo %.2f,%.2f\n", l->x, l->y);
425 if(l->type == gfx_splineTo) {
426 fprintf(fi, "splineTo %.2f,%.2f %.2f,%.2f\n", l->sx, l->sy, l->x, l->y);
432 void gfxline_free(gfxline_t*l)
434 if(l && (l+1) == l->next) {
448 static inline gfxpoint_t cspline_getpoint(const struct cspline_t*s, double t)
454 double mtmt = mt*(1-t);
455 double mtmtmt = mtmt*(1-t);
456 p.x= s->end.x*ttt + 3*s->control2.x*tt*mt
457 + 3*s->control1.x*t*mtmt + s->start.x*mtmtmt;
458 p.y= s->end.y*ttt + 3*s->control2.y*tt*mt
459 + 3*s->control1.y*t*mtmt + s->start.y*mtmtmt;
462 static gfxpoint_t qspline_getpoint(const qspline_t*s, double t)
465 p.x= s->end.x*t*t + 2*s->control.x*t*(1-t) + s->start.x*(1-t)*(1-t);
466 p.y= s->end.y*t*t + 2*s->control.y*t*(1-t) + s->start.y*(1-t)*(1-t);
470 static int approximate3(const cspline_t*s, qspline_t*q, int size, double quality2)
472 unsigned int gran = 0;
473 unsigned int istep = 0x80000000;
474 unsigned int istart = 0;
478 while(istart<0x80000000)
480 unsigned int iend = istart + istep;
481 double start = istart/(double)0x80000000;
482 double end = iend/(double)0x80000000;
485 char left = 0,recurse=0;
490 /* create simple approximation: a qspline_t which run's through the
491 qspline_t point at 0.5 */
492 test.start = cspline_getpoint(s, start);
493 test.control = cspline_getpoint(s, (start+end)/2);
494 test.end = cspline_getpoint(s, end);
495 /* fix the control point:
496 move it so that the new spline does runs through it */
497 test.control.x = -(test.end.x + test.start.x)/2 + 2*(test.control.x);
498 test.control.y = -(test.end.y + test.start.y)/2 + 2*(test.control.y);
500 /* depending on where we are in the spline, we either try to match
501 the left or right tangent */
505 pos = left?start:end;
507 test.control.x = s->end.x*(3*qpos) + 3*s->control2.x*(2*pos-3*qpos) +
508 3*s->control1.x*(1-4*pos+3*qpos) + s->start.x*(-3+6*pos-3*qpos);
509 test.control.y = s->end.y*(3*qpos) + 3*s->control2.y*(2*pos-3*qpos) +
510 3*s->control1.y*(1-4*pos+3*qpos) + s->start.y*(-3+6*pos-3*qpos);
512 test.control.x *= (end-start)/2;
513 test.control.y *= (end-start)/2;
514 test.control.x += test.start.x;
515 test.control.y += test.start.y;
517 test.control.x *= -(end-start)/2;
518 test.control.y *= -(end-start)/2;
519 test.control.x += test.end.x;
520 test.control.y += test.end.y;
525 /* measure the spline's accurancy, by taking a number of probes */
526 for(t=0;t<probes;t++) {
527 gfxpoint_t qr1,qr2,cr1,cr2;
528 double pos = 0.5/(probes*2)*(t*2+1);
531 qr1 = qspline_getpoint(&test, pos);
532 cr1 = cspline_getpoint(s, start+pos*(end-start));
541 qr2 = qspline_getpoint(&test, (1-pos));
542 cr2 = cspline_getpoint(s, start+(1-pos)*(end-start));
552 #else // quadratic error: *much* faster!
554 /* convert control point representation to
555 d*x^3 + c*x^2 + b*x + a */
556 dx= s->end.x - s->control2.x*3 + s->control1.x*3 - s->start.x;
557 dy= s->end.y - s->control2.y*3 + s->control1.y*3 - s->start.y;
559 /* we need to do this for the subspline between [start,end], not [0,1]
560 as a transformation of t->a*t+b does nothing to highest coefficient
561 of the spline except multiply it with a^3, we just need to modify
563 {double m = end-start;
568 /* use the integral over (f(x)-g(x))^2 between 0 and 1
569 to measure the approximation quality.
570 (it boils down to const*d^2) */
571 recurse = (dx*dx + dy*dy > quality2);
574 if(recurse && istep>1 && size-level > num) {
581 while(!(istart & istep)) {
590 void gfxdraw_conicTo(gfxdrawer_t*draw, double cx, double cy, double tox, double toy, double quality)
592 double c1x = (draw->x + 2 * cx) / 3;
593 double c1y = (draw->y + 2 * cy) / 3;
594 double c2x = (2 * cx + tox) / 3;
595 double c2y = (2 * cy + toy) / 3;
596 gfxdraw_cubicTo(draw, c1x, c1y, c2x, c2y, tox, toy, quality);
600 void gfxdraw_cubicTo(gfxdrawer_t*draw, double c1x, double c1y, double c2x, double c2y, double x, double y, double quality)
604 double maxerror = quality>0 ? quality : 1.0;
616 num = approximate3(&c, q, 128, maxerror);
621 mid.x = q[t].control.x;
622 mid.y = q[t].control.y;
625 draw->splineTo(draw, mid.x, mid.y, to.x, to.y);
629 gfxbbox_t gfxbbox_expand_to_point(gfxbbox_t box, gfxcoord_t x, gfxcoord_t y)
631 if(box.xmin==0 && box.ymin==0 && box.xmax==0 && box.ymax==0) {
636 if(x==0 && y==0) box.xmax = 0.0000001;
650 void gfxbbox_intersect(gfxbbox_t*box1, gfxbbox_t*box2)
652 if(box2->xmin > box1->xmin)
653 box1->xmin = box2->xmin;
654 if(box2->ymin > box1->ymin)
655 box1->ymin = box2->ymin;
656 if(box2->xmax < box1->xmax)
657 box1->xmax = box2->xmax;
658 if(box2->ymax > box1->ymax)
659 box1->ymax = box2->ymax;
660 if(box1->xmin > box1->xmax)
661 box1->xmax = box1->xmin;
662 if(box1->ymin > box1->ymax)
663 box1->ymax = box1->ymin;
666 gfxbbox_t gfxline_getbbox(gfxline_t*line)
669 gfxbbox_t bbox = {0,0,0,0};
672 if(line->type == gfx_moveTo) {
674 } else if(line->type == gfx_lineTo) {
675 if(last) bbox = gfxbbox_expand_to_point(bbox, x, y);
676 bbox = gfxbbox_expand_to_point(bbox, line->x, line->y);
678 } else if(line->type == gfx_splineTo) {
679 if(last) bbox = gfxbbox_expand_to_point(bbox, x, y);
680 bbox = gfxbbox_expand_to_point(bbox, line->sx, line->sy);
681 bbox = gfxbbox_expand_to_point(bbox, line->x, line->y);
691 gfxline_t* gfxline_append(gfxline_t*line1, gfxline_t*line2)
693 gfxline_t*l = line1;;
703 void gfxline_transform(gfxline_t*line, gfxmatrix_t*matrix)
706 double x = matrix->m00*line->x + matrix->m10*line->y + matrix->tx;
707 double y = matrix->m01*line->x + matrix->m11*line->y + matrix->ty;
710 if(line->type == gfx_splineTo) {
711 double sx = matrix->m00*line->sx + matrix->m10*line->sy + matrix->tx;
712 double sy = matrix->m01*line->sx + matrix->m11*line->sy + matrix->ty;
720 void gfxmatrix_dump(gfxmatrix_t*m, FILE*fi, char*prefix)
722 fprintf(fi, "%f %f | %f\n", m->m00, m->m10, m->tx);
723 fprintf(fi, "%f %f | %f\n", m->m01, m->m11, m->ty);
726 void gfxmatrix_transform(gfxmatrix_t*m, double* v, double*dest)
728 dest[0] = m->m00*v[0] + m->m10*v[1] + m->tx;
729 dest[1] = m->m01*v[0] + m->m11*v[1] + m->ty;
731 void gfxmatrix_invert(gfxmatrix_t*m, gfxmatrix_t*dest)
733 double det = m->m00 * m->m11 - m->m10 * m->m01;
735 memset(dest, 0, sizeof(gfxmatrix_t));
739 dest->m00 = m->m11 * det;
740 dest->m01 = -m->m01 * det;
741 dest->m10 = -m->m10 * det;
742 dest->m11 = m->m00 * det;
743 dest->tx = -(dest->m00 * m->tx + dest->m10 * m->ty);
744 dest->ty = -(dest->m01 * m->tx + dest->m11 * m->ty);
746 void gfxmatrix_unit(gfxmatrix_t*m)
748 memset(m, 0, sizeof(gfxmatrix_t));
752 void gfxmatrix_multiply(gfxmatrix_t*m1, gfxmatrix_t*m2, gfxmatrix_t*dest)
754 dest->m00 = m1->m00*m2->m00 + m1->m10*m2->m01;
755 dest->m01 = m1->m01*m2->m00 + m1->m11*m2->m01;
756 dest->m10 = m1->m00*m2->m10 + m1->m10*m2->m11;
757 dest->m11 = m1->m01*m2->m10 + m1->m11*m2->m11;
758 dest->tx = m1->m00*m2->tx + m1->m10*m2->ty + m1->tx;
759 dest->ty = m1->m01*m2->tx + m1->m11*m2->ty + m1->ty;
762 gfxfontlist_t* gfxfontlist_create()
764 /* Initial list ist empty */
768 gfxfont_t*gfxfontlist_findfont(gfxfontlist_t*list, char*id)
770 gfxfontlist_t*l = list;
772 if(!strcmp((char*)l->font->id, id)) {
779 char gfxfontlist_hasfont(gfxfontlist_t*list, gfxfont_t*font)
781 gfxfontlist_t*l = list;
783 if(!strcmp((char*)l->font->id, font->id)) {
790 gfxfontlist_t*gfxfontlist_addfont(gfxfontlist_t*list, gfxfont_t*font)
792 gfxfontlist_t*last=0,*l = list;
795 if(l->font == font) {
796 return list; // we already know this font
801 fprintf(stderr, "Tried to add zero font\n");
803 l = (gfxfontlist_t*)rfx_calloc(sizeof(gfxfontlist_t));
813 void gfxfontlist_free(gfxfontlist_t*list, char deletefonts)
815 gfxfontlist_t*l = list;
817 gfxfontlist_t*next = l->next;
818 if(deletefonts && l->font) {
819 gfxfont_free(l->font);l->font=0;
827 gfxline_t*gfxline_makerectangle(int x1,int y1,int x2, int y2)
829 gfxline_t* line = (gfxline_t*)rfx_calloc(sizeof(gfxline_t)*5);
830 line[0].x = x1;line[0].y = y1;line[0].type = gfx_moveTo;line[0].next = &line[1];
831 line[1].x = x2;line[1].y = y1;line[1].type = gfx_lineTo;line[1].next = &line[2];
832 line[2].x = x2;line[2].y = y2;line[2].type = gfx_lineTo;line[2].next = &line[3];
833 line[3].x = x1;line[3].y = y2;line[3].type = gfx_lineTo;line[3].next = &line[4];
834 line[4].x = x1;line[4].y = y1;line[4].type = gfx_lineTo;
838 gfxline_t*gfxline_makecircle(double x,double y,double rx, double ry)
842 double begin = 0.7070;
843 gfxline_t** line = (gfxline_t**)rfx_calloc(sizeof(gfxline_t*)*9);
846 line[t] = rfx_calloc(sizeof(gfxline_t));
848 line[0]->type = gfx_moveTo;
849 line[0]->x = x+begin*rx;
850 line[0]->y = y+begin*ry;
852 line[t-1]->next = line[t];
853 line[t]->type = gfx_splineTo;
856 #define R(nr,cx,cy,mx,my) \
857 line[nr]->sx = line[nr-1]->x + (cx); \
858 line[nr]->sy = line[nr-1]->y + (cy); \
859 line[nr]->x = line[nr]->sx + (mx); \
860 line[nr]->y = line[nr]->sy + (my);
861 R(1, -C1*rx, C1*ry, -C2*rx, 0);
862 R(2, -C2*rx, 0, -C1*rx, -C1*ry);
863 R(3, -C1*rx, -C1*ry, 0, -C2*ry);
864 R(4, 0, -C2*ry, C1*rx, -C1*ry);
865 R(5, C1*rx, -C1*ry, C2*rx, 0);
866 R(6, C2*rx, 0, C1*rx, C1*ry);
867 R(7, C1*rx, C1*ry, 0, C2*ry);
868 R(8, 0, C2*ry, -C1*rx, C1*ry);
869 gfxline_t*l = line[0];
874 gfxbbox_t* gfxline_isrectangle(gfxline_t*_l)
879 gfxline_t*l = gfxline_clone(_l);
894 if(xc==2 && x!=x1 && x!=x2) {fail=1;break;}
895 else if(xc>=1 && x==x1) {left=0;}
896 else if(xc==2 && x==x2) {left=1;}
897 else if(xc==1 && x!=x1) {x2 = x; xc=2; left=1;}
898 else if(xc==0) {x1 = x; xc=1;left=0;}
899 else {fprintf(stderr, "Internal error in rectangle detection\n");}
901 if(yc==2 && y!=y1 && y!=y2) {fail=1;break;}
902 else if(yc>=1 && y==y1) {top=0;}
903 else if(yc==2 && y==y2) {top=1;}
904 else if(yc==1 && y!=y1) {y2 = y; yc=2; top=1;}
905 else if(yc==0) {y1 = y; yc=1;top=0;}
906 else {fprintf(stderr, "Internal error in rectangle detection\n");}
908 char pos=top<<1|left;
911 /* diagonal lines not allowed */
916 /* no corner except the first one may be touched twice */
917 if(pos && (corners & 1<<pos)) {
920 /* mark which corners have been touched so far */
928 if(corners!=0x0f) return 0; // not all 4 corners reached
930 if(x2<x1) {double x = x2;x2=x1;x1=x;}
931 if(y2<y1) {double y = y2;y2=y1;y1=y;}
933 gfxbbox_t*r = malloc(sizeof(gfxbbox_t));
934 r->xmin = x1; r->ymin = y1;
935 r->xmax = x2; r->ymax = y2;
939 void gfximage_transform(gfximage_t*img, gfxcxform_t*cxform)
942 int size = img->width*img->height;
948 rr = (int)(cxform->rr*256);gr = (int)(cxform->gr*256);
949 rg = (int)(cxform->rg*256);gg = (int)(cxform->gg*256);
950 rb = (int)(cxform->rb*256);gb = (int)(cxform->gb*256);
951 ra = (int)(cxform->ra*256);ga = (int)(cxform->ga*256);
952 br = (int)(cxform->br*256);ar = (int)(cxform->ar*256);tr = (int)(cxform->tr*256);
953 bg = (int)(cxform->bg*256);ag = (int)(cxform->ag*256);tg = (int)(cxform->tg*256);
954 bb = (int)(cxform->bb*256);ab = (int)(cxform->ab*256);tb = (int)(cxform->tb*256);
955 ba = (int)(cxform->ba*256);aa = (int)(cxform->aa*256);ta = (int)(cxform->ta*256);
957 for(t=0;t<size;t++) {
958 gfxcolor_t*pixel = &img->data[t];
959 unsigned char r = (pixel->r * rr + pixel->g * rg + pixel->b * rb + pixel->a * ra + tr) / 256;
960 unsigned char g = (pixel->r * gr + pixel->g * gg + pixel->b * gb + pixel->a * ga + tg) / 256;
961 unsigned char b = (pixel->r * br + pixel->g * bg + pixel->b * bb + pixel->a * ba + tb) / 256;
962 unsigned char a = (pixel->r * ar + pixel->g * ag + pixel->b * ab + pixel->a * aa + ta) / 256;
969 void gfxline_dump(gfxline_t*line, FILE*fi, char*prefix)
972 if(line->type == gfx_moveTo) {
973 fprintf(fi, "%smoveTo %.2f %.2f\n", prefix, line->x, line->y);
974 } else if(line->type == gfx_lineTo) {
975 fprintf(fi, "%slineTo %.2f %.2f\n", prefix, line->x, line->y);
976 } else if(line->type == gfx_splineTo) {
977 fprintf(fi, "%ssplineTo (%.2f %.2f) %.2f %.2f\n", prefix, line->sx, line->sy, line->x, line->y);